This book is old, but is really good in explaining how to have an efficient work flow using vector art. Read the reviews to see if it might help you. To me, the best single source in understanding how to effectively use vector art. A good place to learn the basics and prepare you to master the tools. I love what vector art can do, and I think you will too once you become more confident.
Vector Basic Training: A Systematic Creative Process for Building Precision Vector Artwork
https://www.amazon.com/dp/0321749596/ref=cm_sw_r_cp_api_i_l2rnFb8RYWMNW
Great start. I suggest reading Vector Basic Training by Von Glitschka. His explanation of the clockwork method alone is worth the price of the book.
If you plan to develop a career as a vector artist I highly recommend reading this book: https://www.amazon.com/Vector-Basic-Training-Systematic-Precision/dp/0321749596/ref=sr_1_1?ie=UTF8&qid=1499928601&sr=8-1&keywords=glitschka